/// <summary>
/// The element <paramref name="myNewElement"/> is new if
/// - it is not a special type attribute and there is an asterisk selection at this level
/// - it is not the last part AND there is already an item of this part with the same alias and the same Depth
/// </summary>
/// <param name="myExistingElement"></param>
/// <param name="myNewElement"></param>
/// <returns></returns>
private Boolean IsNewSelectionElement(SelectionElement myExistingElement, SelectionElement myNewElement)
{
#region The existing is an asterisk and the new one is NOT a SpecialTypeAttribute
if (myExistingElement.Selection == TypesOfSelect.Asterisk && !myNewElement.RelatedIDChainDefinition.IsSpecialTypeAttribute())
{
return false;
}
#endregion
#region The same level is already selected
var item = myExistingElement;
var selElem = myNewElement;
if (item.Alias == selElem.Alias &&
// same depth or Undefined and one lower depth Friends.Undefined is Depth 1 and Friends.Age is Depth 2 but at the same selection level
(item.RelatedIDChainDefinition.Depth == selElem.RelatedIDChainDefinition.Depth || (selElem.RelatedIDChainDefinition.IsUndefinedAttribute && item.RelatedIDChainDefinition.Depth == selElem.RelatedIDChainDefinition.Depth + 1))
)
{
return false;
}
#endregion
return true;
}
/// <summary> Gets an attribute value - references will be resolved. </summary>
///
/// <remarks> Stefan, 16.04.2010. </remarks>
///
/// <param name="myType"> Type. </param>
/// <param name="myTypeAttribute"> my type attribute. </param>
/// <param name="myDBObject"> my database object. </param>
/// <param name="myDepth"> Depth of my. </param>
/// <param name="myLevelKey"> my level key. </param>
/// <param name="reference"> The reference. </param>
/// <param name="myUsingGraph"> true to my using graph. </param>
/// <param name="attributeValue"> [out] The attribute value. </param>
///
/// <returns> true if it succeeds, false if the DBO does not have the attribute. </returns>
private Boolean GetAttributeValueAndResolve(GraphDBType myType, SelectionElement mySelectionelement, DBObjectStream myDBObject, Int64 myDepth, EdgeList myLevelKey, String reference, Boolean myUsingGraph, out Object attributeValue, String myUndefAttrName = null)
{
var typeAttribute = mySelectionelement.Element;
if (typeAttribute.TypeCharacteristics.IsBackwardEdge)
{
#region IsBackwardEdge
EdgeKey edgeKey = typeAttribute.BackwardEdgeDefinition;
var contBackwardExcept = myDBObject.ContainsBackwardEdge(edgeKey, _DBContext, _DBContext.DBObjectCache, myType);
if (contBackwardExcept.Failed())
throw new GraphDBException(contBackwardExcept.IErrors);
if (contBackwardExcept.Value)
{
if (myDepth > 0)
{
var dbos = myDBObject.GetBackwardEdges(edgeKey, _DBContext, _DBContext.DBObjectCache, typeAttribute.GetDBType(_DBContext.DBTypeManager));
if (dbos.Failed())
throw new GraphDBException(dbos.IErrors);
if (dbos.Value != null)
{
attributeValue = ResolveAttributeValue(typeAttribute, dbos.Value, myDepth, myLevelKey, myDBObject, reference, myUsingGraph);
return true;
}
}
else
{
attributeValue = GetNotResolvedBackwardEdgeReferenceAttributeValue(myDBObject, typeAttribute, edgeKey, myLevelKey, myUsingGraph, _DBContext);
return true;
}
}
#endregion
}
else if (myDBObject.HasAttribute(typeAttribute, _DBContext))
{
#region SelectValueAssignment - kind of static assignment of selected attribute
if (mySelectionelement.SelectValueAssignment != null && mySelectionelement.SelectValueAssignment.ValueAssignmentType == SelectValueAssignment.ValueAssignmentTypes.Always)
{
// Currently the prior add SelectionElement verifies that TermDefinition is always a ValueDefinition - if others will become valid this must be changed!
attributeValue = (mySelectionelement.SelectValueAssignment.TermDefinition as ValueDefinition).Value.Value;
return true;
}
#endregion
#region ELSE (!IsBackwardEdge)
#region not a reference attribute value
if (!typeAttribute.IsUserDefinedType(_DBContext.DBTypeManager))
{
var attrVal = myDBObject.GetAttribute(typeAttribute, myType, _DBContext);
if (attrVal.Failed())
{
throw new GraphDBException(attrVal.IErrors);
}
// currently, we do not want to return a ADBBaseObject but the real value
if (attrVal.Value is ADBBaseObject)
attributeValue = (attrVal.Value as ADBBaseObject).GetReadoutValue();
else if (attrVal.Value is IBaseEdge)
attributeValue = (attrVal.Value as IBaseEdge).GetReadoutValues();
else
attributeValue = attrVal.Value;
return true;
}
#endregion
#region ELSE Reference attribute value
else
{
if (myDepth > 0)
{
var attrValue = myDBObject.GetAttribute(typeAttribute.UUID, myType, _DBContext);
attributeValue = ResolveAttributeValue(typeAttribute, attrValue, myDepth, myLevelKey, myDBObject, reference, myUsingGraph);
return true;
}
else
{
attributeValue = GetNotResolvedReferenceAttributeValue(myDBObject, typeAttribute, myType, myLevelKey, myUsingGraph, _DBContext);
return true;
}
}
#endregion
#endregion
}
else if (mySelectionelement.SelectValueAssignment != null)
{
// Currently the prior add SelectionElement verifies that TermDefinition is always a ValueDefinition - if others will become valid this must be changed!
attributeValue = (mySelectionelement.SelectValueAssignment.TermDefinition as ValueDefinition).Value.Value;
return true;
}
attributeValue = null;
return false;
}
/// <summary>
/// Adds the typeNode as an asterisk *, rhomb # or minus - or ad
/// </summary>
/// <param name="typeNode"></param>
public Exceptional AddSelectionType(String myReference, GraphDBType myType, TypesOfSelect mySelType, TypeUUID myTypeID = null)
{
var selElem = new SelectionElement(mySelType, myTypeID);
if (!_Selections.ContainsKey(myReference))
_Selections.Add(myReference, new Dictionary<EdgeList, List<SelectionElement>>());
var level = new EdgeList(new EdgeKey(myType.UUID, null));
if (!_Selections[myReference].ContainsKey(level))
_Selections[myReference].Add(level, new List<SelectionElement>());
if (!_Selections[myReference][level].Exists(item => item.Selection == mySelType))
{
_Selections[myReference][level].Add(selElem);
}
return Exceptional.OK;
}
/// <summary>
/// Single IDNode selection attribute
/// </summary>
/// <param name="myReference"></param>
/// <param name="myAlias"></param>
/// <param name="myAStructureNode"></param>
/// <param name="myGraphType"></param>
public Exceptional AddElementToSelection(string myAlias, String myReference, IDChainDefinition myIDChainDefinition, Boolean myIsGroupedOrAggregated, SelectValueAssignment mySelectValueAssignment = null)
{
SelectionElement lastElem = null;
var curLevel = new EdgeList();
EdgeList preLevel = null;
if (myReference != null && _Selections.ContainsKey(myReference) && _Selections[myReference].Any(kv => kv.Value.Any(se => se.RelatedIDChainDefinition == myIDChainDefinition && se.Alias == myAlias)))
{
return new Exceptional(new Error_DuplicateAttributeSelection(myAlias));
}
foreach (var nodeEdgeKey in myIDChainDefinition)
{
if (nodeEdgeKey is ChainPartTypeOrAttributeDefinition)
{
#region Usual attribute
preLevel = null;
var selElem = new SelectionElement(myAlias, curLevel, myIsGroupedOrAggregated, myIDChainDefinition);
var typeOrAttr = (nodeEdgeKey as ChainPartTypeOrAttributeDefinition);
if (true || typeOrAttr.DBType != null && typeOrAttr.TypeAttribute != null)
{
#region defined
var edgeKey = typeOrAttr.EdgeKey;
selElem.Element = typeOrAttr.TypeAttribute; //_DBContext.DBTypeManager.GetTypeAttributeByEdge(edgeKey);
if (String.IsNullOrEmpty(selElem.Alias) || (nodeEdgeKey.Next != null && !(nodeEdgeKey.Next is ChainPartFuncDefinition)))
{
selElem.Alias = typeOrAttr.TypeAttribute.Name;//_DBContext.DBTypeManager.GetTypeAttributeByEdge(edgeKey).Name;
}
curLevel += edgeKey;
preLevel = curLevel.GetPredecessorLevel();
#endregion
}
else
{
#region undefined attribute
if (myIDChainDefinition.Level == 0)
{
preLevel = new EdgeList(myIDChainDefinition.LastType.UUID);
}
else
{
var element = _Selections[myReference].Last();
preLevel = curLevel.GetPredecessorLevel();
//preLevel = curLevel;
}
selElem.Alias = typeOrAttr.TypeOrAttributeName;
selElem.Element = new UndefinedTypeAttribute(typeOrAttr.TypeOrAttributeName);
#endregion
}
#region Add to _Selections if valid
if (!_Selections.ContainsKey(myReference))
{
_Selections.Add(myReference, new Dictionary<EdgeList, List<SelectionElement>>());
}
if (!_Selections[myReference].ContainsKey(preLevel))
{
_Selections[myReference].Add(preLevel, new List<SelectionElement>());
}
///
/// Duplicate AttributeSelection is: "U.Name, U.Name" or "U.Name.TOUPPER(), U.Name" but not "U.Friends.TOP(1).Name, U.Friends.TOP(1).Age"
if ((nodeEdgeKey.Next == null || (nodeEdgeKey.Next is ChainPartFuncDefinition && nodeEdgeKey.Next.Next == null))
// U.Name, U.Name U.Name.TOUPPER, U.Name
&& _Selections[myReference][preLevel].Exists(item => item.Alias == selElem.Alias && selElem.EdgeList.Level == item.EdgeList.Level && item.RelatedIDChainDefinition.Depth == selElem.RelatedIDChainDefinition.Depth && item.Element != null) && !myIsGroupedOrAggregated)
{
return new Exceptional(new Error_DuplicateAttributeSelection(selElem.Alias));
}
// Do not add again if:
// - it is a defined attribute and there is an asterisk selection at this level
// - it is not the last part AND
// - there is already an item of this part with the same alias and the same Depth
if (nodeEdgeKey.Next == null || _Selections[myReference][preLevel].Count == 0 || _Selections[myReference][preLevel].Any(item => IsNewSelectionElement(item, selElem)))
{
_Selections[myReference][preLevel].Add(selElem);
}
#endregion
lastElem = selElem;
#endregion
}
else if (nodeEdgeKey is ChainPartFuncDefinition)
{
var chainPartFuncDefinition = (nodeEdgeKey as ChainPartFuncDefinition);
#region Function
if (myReference == null)
{
#region Type independent functions
var selElem = new SelectionElement(myAlias, myIDChainDefinition);
if (String.IsNullOrEmpty(selElem.Alias))
{
selElem.Alias = chainPartFuncDefinition.SourceParsedString;
}
var funcElem = new SelectionElementFunction(selElem, chainPartFuncDefinition, chainPartFuncDefinition.Parameters);
if (lastElem is SelectionElementFunction)
{
(lastElem as SelectionElementFunction).AddFollowingFunction(funcElem);
lastElem = funcElem;
}
else
{
if (_SelectionElementsTypeIndependend.Any(se => se.Alias == funcElem.Alias))
{
return new Exceptional(new Error_DuplicateAttributeSelection(funcElem.Alias));
}
_SelectionElementsTypeIndependend.Add(funcElem);
lastElem = funcElem;
}
#endregion
}
else
{
#region Type dependent function
var funcElem = new SelectionElementFunction(lastElem, (nodeEdgeKey as ChainPartFuncDefinition), (nodeEdgeKey as ChainPartFuncDefinition).Parameters);
funcElem.RelatedIDChainDefinition = myIDChainDefinition;
if (!String.IsNullOrEmpty(myAlias) && nodeEdgeKey.Next == null)
{
funcElem.Alias = myAlias;
}
if (lastElem is SelectionElementFunction)
{
(lastElem as SelectionElementFunction).AddFollowingFunction(funcElem);
lastElem = funcElem;
}
else if (_Selections[myReference][preLevel].Contains(lastElem))
{
#region Add function to the last selection element (replace it)
_Selections[myReference][preLevel].Remove(lastElem);
//lastElem = new SelectionElementFunction(lastElem, (nodeEdgeKey as ChainPartFuncDefinition), (nodeEdgeKey as ChainPartFuncDefinition).Parameters);
//lastElem.RelatedIDChainDefinition = myIDChainDefinition;
//if (!String.IsNullOrEmpty(alias) && nodeEdgeKey.Next == null)
//{
// lastElem.Alias = alias;
//}
lastElem = funcElem;
if (!_Selections[myReference][preLevel].Contains(lastElem)) // In case this Element with func is already in the selection list do nothing.
{
_Selections[myReference][preLevel].Add(lastElem);
}
#endregion
}
else if (!_Selections[myReference][preLevel].Contains(funcElem))
{
#region In this case we have a similar function but NOT THE SAME. Since we don't know what to do, return error.
return new Exceptional(new Error_InvalidAttributeSelection(myIDChainDefinition.ContentString));
#endregion
}
#endregion
}
#endregion
}
}
#region Set the SelectValueAssignment for the last element
if (lastElem != null && mySelectValueAssignment != null)
{
#region Error handling
System.Diagnostics.Debug.Assert(lastElem.Element != null);
if (lastElem.Element.IsUserDefinedType(_DBContext.DBTypeManager))
{
return new Exceptional(new Error_InvalidSelectValueAssignment(lastElem.Element.Name));
}
if (!(mySelectValueAssignment.TermDefinition is ValueDefinition))
{
return new Exceptional(new Error_NotImplemented(new System.Diagnostics.StackTrace(true)));
}
#endregion
#region Validate datatype if the attribute is a defined attribute
if (!(lastElem.Element is UndefinedTypeAttribute))
{
if (!lastElem.Element.GetADBBaseObjectType(_DBContext.DBTypeManager).IsValidValue((mySelectValueAssignment.TermDefinition as ValueDefinition).Value.Value))
{
return new Exceptional(new Error_SelectValueAssignmentDataTypeDoesNotMatch(lastElem.Element.GetADBBaseObjectType(_DBContext.DBTypeManager).ObjectName, (mySelectValueAssignment.TermDefinition as ValueDefinition).Value.ObjectName));
}
var typedValue = new ValueDefinition(lastElem.Element.GetADBBaseObjectType(_DBContext.DBTypeManager).Clone((mySelectValueAssignment.TermDefinition as ValueDefinition).Value.Value));
mySelectValueAssignment.TermDefinition = typedValue;
}
#endregion
lastElem.SelectValueAssignment = mySelectValueAssignment;
}
#endregion
return Exceptional.OK;
}
public SelectionElementFunction(SelectionElement mySelectionElement, ChainPartFuncDefinition myFunction, List<AExpressionDefinition> myParameters)
{
this.Alias = mySelectionElement.Alias;
this.EdgeList = mySelectionElement.EdgeList;
this.Element = mySelectionElement.Element;
this.Selection = mySelectionElement.Selection;
this.IsGroupedOrAggregated = mySelectionElement.IsGroupedOrAggregated;
this.LevelKey = mySelectionElement.LevelKey;
this.RelatedIDChainDefinition = mySelectionElement.RelatedIDChainDefinition;
Function = myFunction;
Parameters = myParameters;
}